DE29816507U1 - Gas powered small combustion engine - Google Patents

Description

Description
for utility model registration of

Wolfgang Maier, Innstr. 47/48,12045 Berlin,

concerning
Gas-powered small combustion engine

The invention relates to a small combustion engine without lubricating oil consumption in the combustion chamber.

Small combustion engines are known that ignite fuel using a glow plug, an ignition spark or through compression heat. Small combustion engines are also known that work in both the four-stroke and two-stroke processes.

In all of the above-mentioned designs and processes, lubricating oil is either mixed with the fuel or otherwise supplied between the piston and the cylinder wall to ensure functionality or to avoid friction losses. The disadvantage of this is that part of the lubricating oil is burned during the combustion process of the fuel and thus enters the environment as exhaust gases.

The present invention avoids this disadvantage.

This is achieved on the one hand by the fact that the lateral pressure on the piston and cylinder wall that occurs in crank drives is absorbed by a guide built between them, so that only forces in the longitudinal direction of the axis of movement can act on the piston. The friction between the piston and the cylinder wall is therefore greatly reduced. On the other hand, by using combustible gas as fuel, the combustion residues such as paraffin are used for lubrication.

Another feature that helps achieve this advantage is that the fuel tank is designed as a pressure tank. As the fuel flows out of the tank and into the combustion chamber, the pressure-relieving gas cools the piston and cylinder.

This technical design of the combustion engine has the advantage that it enables particularly low-emission operation and reduces the friction pressure and thermal load on the cylinder and piston to such an extent that, by using suitable materials for the piston and cylinder, lubrication with lubricating oil in the combustion chamber can be dispensed with.

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The invention will now be explained in more detail with reference to the accompanying drawings.

Fig. 1 shows a basic representation of the small combustion engine

according to the invention.
Fig. 2 shows an overall view in section
Fig. 3 shows a top view of the described engine

Fig. 1 shows a schematic representation of a small combustion engine according to the invention, where (1) represents the crank mechanism of the engine. Between the crank mechanism (1) and the piston (3) a guide (2) is mounted which absorbs the lateral forces of the crank mechanism (1). The guide consists on the one hand of a movable part (17) and one or more parts firmly connected to the engine housing.(14) The movable part of the guide is designed in Fig. and 3 as a guide carriage (17) and is connected to a control rod (5) which follows the stroke movement of the piston (3), thereby actuating the gas valve (15) and the air inlet valve (6). It is also clear how the outlet openings (4), the gas valve (15) and the inlet valve (6) open simultaneously in the area of the bottom dead center of the crank mechanism (1) and close again when the crank mechanism (1) continues to rotate. The gas under pressure in the gas tank (12) flows through the nozzle (8) into the mixing tube (9), whereby air is entrained through the openings (7) and a combustible mixture of air and gas is formed. During this process, the combustible mixture flowing into the combustion chamber (16) via the inlet valve (6) pushes the burned exhaust gases out of the combustion chamber through the outlet openings (4).

Fig. 2 shows a section through the described engine, where the design of the guide of the connecting rod of the crank drive (1) and the piston rod (18) can be seen.

Fig. 3 shows a section and a top view of the small combustion engine. The design of the guide (2) with two guide columns (14) attached to the side of the piston rod and the movable guide part (17) can be seen.

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Reference list:

1 crank drive

2 Guide

3 pistons

4 Outlet opening

5 Push rod

6 Inlet valve

7 air intake openings

8 Gas nozzle

9 Mixing tube

10 Spark plug

11 cylinders

12 Gas tank

13 Base plate

14 guide columns

15 Gas valve

16 Combustion chamber

17 Guide carriage

18 Piston rod

19 Center line

Claims (4)

PROTECTION CLAIMS 1. Gas-powered small combustion engine with crank mechanism, piston, cylinder, valves, control rod and fuel tank, characterized in that a guide (2) is arranged between the crank mechanism (1) and the piston (3), which consists of a guide sleeve firmly connected to the engine housing and an axially movable column guide as a piston rod (18) or of several column guides and a guide carriage with several guide sleeves, and the gas valve (15) and inlet valve (6) are connected to the column guide (18) or the guide carriage via a control rod (5), a mixing tube (9) with air inlet openings (7) being located between the gas valve (15) and inlet valve (6) and a heat exchanger connecting the engine and the fuel tank (12). 2. Gas-operated small combustion engine according to claim 1, characterized in that the guide sleeve for the column guide as a piston rod (18) is arranged centrally in the direction of movement of the piston (3). 3. Gas-powered small combustion engine according to claim 1, characterized in that the fuel tank (12) is a pressure tank. 4. Gas-powered small combustion engine according to claim 1, characterized in that the heat exchanger is a holding plate.